This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
How you use JSF and tiles together depends on the implementation of JSF that you're using. If you're using MyFaces, this link explains how to to it, and it does not involve defining a servlet. If you are using some other implementation of JSF, see if you can find a document detailing specifically how to do it for your implementation.